Most adults would erase all of their personal information online if they could a software firm of 413 random selected adults show that 59% of them would erase all of their personal information online if they could find the value of the test statistic

In a random survey of 2221 North Americans 689 of them had blood type A+. Construct a 94% Confidence Interval for the true proportion of North Americans who have blood type A+.

In a random sample of 230 men , 18 or older , 142 were married. Construct and explain a 90% confidence interval estimate of a true population proportion of married men 18 or older.

Report the​ 95% confidence interval for the percentage of all young people who earned a high school diploma.

In 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the assassination of President Kennedy, and found that 634 believe there was a conspiracy ("Gallup news service" 2013). What is the Estimate of proportion of Americans who believe in this conspiracy using a 90% confidence interval?

Out of a survey of 900 adults, 567 said that teenagers were more dangerous drivers than senior citizens. Construct a 99% confidence interval for p.

In a survey of 2291 ​adults, 708 say they believe in UFOs.   Construct a 90% confidence interval for the population proportion of adults who believe in UFOs

A researcher gathered a sample of participants who volunteered for a studying of phobias. She measured anxiety level of participants as they viewed photos of spiders and again when they viewed puppies. Which statistical test is appropriate for this study and why?

It currently takes users a mean of 2626 minutes to install the most popular computer program made by RodeTech, a software design company. After changes have been made to the program, the company executives want to know if the new mean is now different from 2626 minutes so that they can change their advertising accordingly. A simple random sample of 5151 new customers are asked to time how long it takes for them to install the software. The sample mean is 24.924.9 minutes with a standard deviation of 2.72.7 minutes. Perform a hypothesis test at the 0.0250.025 level of significance to see if the mean installation time has changed.   Step 1 of 3 :   State the null and alternative hypotheses for the test. Fill in the blank below. H0Ha: μ=26: μ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯26

In a random sample of 230 men, 18 or older, 142 are married. Construct and explain a 98% confidence interval estimate of the true population proportion of married men 18 or older.